I am trying to call OpenEvent
of kernel32.dll
using JNA and it fails with the error
java.lang.UnsatisfiedLinkError
: Error looking up function 'OpenEvent': The specified procedure could not be found.
My stub declaration looks like this
public static native Pointer OpenEvent(int access, boolean inheritHandle, String name);
Can someone help me identify the issue here?
-- After making modification based on users feedback I dont get the error now; but OpenEvent method always returns null. This is the code that demonstrates the behavior
/** * Hello world! * */
import com.sun.jna.FromNativeContext; import com.sun.jna.Native; import com.sun.jna.Pointer; import com.sun.jna.PointerType;
public class App { static { Native.register("kernel32"); }
public static native HANDLE OpenEventW(int access, boolean inheritHandle,
String name);
public static native HANDLE CreateEventW(Pointer securityAttributes,
boolean manualReset, boolean initialState, String name);
public static native int GetLastError();
public static void main( String[] args )
{
HANDLE i = CreateEventW(null,false,false,"Global\testEvent");
System.out.println("After create event:"+GetLastError());
HANDLE j = OpenEventW(100000, false, "Global\testEvent");
System.out.println("After open event:"+GetLastError());
}
public static class HANDLE extends PointerType {
public Object fromNative(Object nativeValue, FromNativeContext context) {
Object o = super.fromNative(nativeValue, context);
if (INVALID_HANDLE_VALUE.equals(o))
return INVALID_HANDLE_VALUE;
return o;
}
}
static HANDLE INVALID_HANDLE_VALUE = new HANDLE() {
{ super.setPointer(Pointer.createConstant(-1)); }
public void setPointer(Pointer p) {
throw new UnsupportedOperationException("Immutable reference");
}
};
}
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